Upload
emory-gibbs
View
215
Download
0
Tags:
Embed Size (px)
Citation preview
CTC, Outcome from Two-beam Module Review on15/16.09.2009
G. Riddone, 20.10.2009
Content
Aim and program of the module
review
Module design
baseline as validated in the module review on
15/16-09-2009
alternatives under study
Test program
CLIC modules
CLEX modules
G. Riddone, CTC meeting, 20.10.2009
2
AIM AND PRGRAM OF THE REVIEW
G. Riddone, CTC meeting, 20.10.2009
3
Aim of the reviewThe aim of the CLIC Two-Beam Module review is the following: Present the module baseline for the CDR and few selected
alternatives Review the baseline design for the module
technical design of the different systems, their integration, strategy for transport and installation
Consider alternative design for selected technical systems Update baseline and alternatives, if necessary
Review R&D and engineering efforts for the completion of the CDR
Update workplan, milestones, cost estimate, manpower requirements
G. Riddone, CTC meeting, 20.10.2009
4
Program Introduction
Main requirements (beam physics and RF) Technical systems (focus on baseline and show
alternatives) Integration (module and impact on tunnel) Validation (mock-ups and test modules) Cost issues
Conclusions and future actions
G. Riddone, CTC meeting, 20.10.2009
5
Meeting over two days 15-16 September 2009Report of results at the CLIC workshop and CTC
Program on 15 September 2009Time Title Speakers
08:45-09:00
Welcome and presentation of the agenda
G. Riddone
09:00-09:20
Introduction. Charge for CDR H. Schmickler
09:30-09:50
Introduction. Introduction to module layout and types
G. Riddone
10:30-10:50
Main requirements. Beam dynamics requirements
D. Schulte
11:00-11:20
Main requirements. RF system reqiorements
W. Wuensch
11:30-11:50
Technical systems. Pre-alignment systems H. Mainaud Durand
12:00-12:20
Technical systems. Stabilisation system K. Artoos
14:00-14:20
Technical systems. Supporting system for structure
R. Nousiainen
14:30-14:50
Technical systems. Cooling system R. Nousiainen
15:00-15:20
Technical systems. Vacuum system and interconnections
C. Garion
16:00-16:20
Technical systems. Instrumentation and diagnostics. Beam instrumentation
L. Soby
16:30-16:50
Technical systems. Instrumentation and diagnostics. RF instrumentation
A. Andersson
17:00-17:20
Technical systems. Radiation issues S. Mallows
G. Riddone, CTC meeting, 20.10.2009
6
Program on 16 September 2009
G. Riddone, CTC meeting, 20.10.2009
7
Time Title Speakers
08:45-09:00
Presentation of the agenda G. Riddone
09:00-09:20
Technical systems. Magnet system M. Modena
09:30-09:50
Technical systems. Actuators for main beam feedback
H. Schmickler
10:30-10:50
Integration, validation and cost. System integration in the module
A. Samoshkin
11:00-11:20
Integration, validation and cost. Impact on tunnel integration. Introduction to the tunnel cross-section
J. Osborne
11:30-11:50
Integration, validation and cost. Impact on tunnel integration. Cooling and ventilation systems
M. Nonis
12:00-12:20
Integration, validation and cost. Impact on tunnel integration. Transport studies
K. Kershaw
14:00-15:00
Integration, validation and cost. Test modules: hardware, program, resources, schedule
G. Riddone
16:00-16:20
Integration, validation and cost. Cost issues Ph. Lebrun
16:30-16:50
Conclusions and future actions. Conclusions All
17:00-17:20
Conclusions and future actions. Future actions
All
MODULE DESIGN:BASELINE AND ALTERNATIVES
G. Riddone, CTC meeting, 20.10.2009
8
9 G. Riddone, CTC meeting, 20.10.2009
Module layout
RF structures
G. Riddone, CTC meeting, 20.10.2009
10
Accelerating structure: CLIC G, disks, waveguide damping sealed (100 mV/m, L = 230 mm, aperture ~ 5 mm)
PETS, octants. mini-tank (6.5 MV/m, L=310 mm, aperture 23 mm)
1 PETS powering 2 accelerating structures1 wake-field monitor per ac. structure
Water cooling
Vacuum manifold around each waveguide
PETS on-off
Water cooling for couplers only
Mini-tank for octants
Beam height and interaxis
G. Riddone, CTC meeting, 20.10.2009
11
Beam interaxis: 650 mm same height for the two beams (to be reconsidered after CDR)
Beam height: 620 mm (agreement also from stabilisation WG)
650 mm
Pre-alignment system/ girders
G. Riddone, CTC meeting, 20.10.2009
12
Accelerating structures and PETS + DB Q on girders Girder end supports cradles mechanically
attached to a girder and linked by rods to the adjacent one: snake-system with articulation points adopted (DB: 100 A, MB: minimization of wakefields, validation at 30 GHz in CTF2)
Separate girders for main and drive beam possibility to align DB quadrupole separate from accelerating structures Alternative under study: mono-
girder+ better stability, simplification for transport and installation- non-independent alignment MB and DB (is separate align. needed?)- additional weight for movers (cam system, are we ready?)
Support for MBQ - BPM
G. Riddone, CTC meeting, 20.10.2009
13
Separate support for MB Q and its BPM snake system interrupted at each MB quadrupole
MB Q and BPM rigidly mechanically connected
No full continuity between MB girders (increasing of align. cost)MB girder length changes as function of module type No girder underneath MB Q Beam height loweredMBQ support simplified
MB Q beam pipe and AS beam pipe are coupled via bellows
Module sections
0
1
2
3
4
840 845 850 855 860 865 870
0
1
2
3
4
5010 5020 5030 5040 5050 5060 5070 5080
0
1
2
3
4
20090 20100 20110 20120 20130 20140 20150
Close to IP better alignment
IP
G. Riddone, CTC meeting, 20.10.2009
14
With MB quad
Beam-Based Feedback
G. Riddone, CTC meeting, 20.10.2009
15
Common actuators/devices for stabilization and beam-based feedback systems extend dynamic range of stabilization actuators by 100 ! and
make BBF corrections by displacing the MB quads.Fullscale = ± 5 um compared to ± 50 nm (several drawbacks)
original configuration additional windings onto quad jokes in order to produce “a sort of dipole correction field”
MB quad: solid yoke, not possible to insert correct coils (bandwidth problems)
New proposed configuration: use electromagnetic correction coils for RT trajectory correction: 1 cm long 0.1 - 0.4 T magnet at each MB quad (feasibility under evaluation)
Interconnections
G. Riddone, CTC meeting, 20.10.2009
16
MB: gap is accepted (damping is needed for the long range wake)
DB: electrical continuity is required (100 A) MB-DB: choke mode flanges (flexibility needed during
thermal transient and alignment)
DBMB
Others
G. Riddone, CTC meeting, 20.10.2009
17
Vacuum design based on 10-8 mbar requirement
Cooling Water cooling for RF structures and quadrupoles Air cooling for quadrupole cables (powering strategy)
Instrumentation BPM: 1 per Q WFM: 1 per ac. Structure Breakdown monitors (1 per PETS unit?) – how is it done?
Problem of radiation hardness
G. Riddone, CTC meeting, 20.10.2009
18
TEST PROGRAM
G. Riddone, CTC meeting, 20.10.2009
19
Motivation for Test Modules
G. Riddone, CTC meeting, 20.10.2009
20
One of the feasibility issues is the two beam accelerating (two beam module is part of the program)
Address feasibility issues in an integrated approach e.g. RF structures, stabilization-alignment-supporting
systems
Establish coherence between existing test set-up up to future test modules in CLEX
Validate technical systems (tests in the labs) - if possible use components from stand-alone tests for test modules in CLEX
Validate two-beam acceleration scheme (tests in CLEX with beam)
Test modules
G. Riddone, CTC meeting, 20.10.2009
21
CLIC modules(as much as possible
close to CLIC modules)
CLEX test modules (Eucard – NCLinac –WP9.2/9.3) (to be adapted to test infrastructures)
We have to establish a test program with clear
milestones before and after CDR
TEST MODULESone project with two parallel lines
Strategy for main linac two-beam module validation
G. Riddone, CTC meeting, 20.10.2009
22
Objectives of the CLIC modules
G. Riddone, CTC meeting, 20.10.2009
23
Integration of all technical systems (dummy RF structures and quadrupoles can be used – real dead weight and interfaces to other systems)
Full metrology Pre-alignment of MB and DB, including fiducialisation Interconnections validation under different simulated thermal
loads Stabilisation of main beam quad in the module environment Vibration study of all systems and identification of vibration
sources Measurement of resonant frequencies Heating in several thermal cycles. Measurements of thermal
transient e.g. how long it takes to achieve a new equilibrium state.
Transport of the module and verification of alignment
CLIC modules (LAB)
G. Riddone, CTC meeting, 20.10.2009
24
Phase 1
Phase 2
Phase 3
Pre-alignment validation with dummy elements Interconnections - pumping (static conditions) Repositioning Measurements of resonant frequenciesTransport and thermal cyclesMeasurements of resonant frequencies
Stabilization (Q) and pre-alignment compatibilityVibration study of all system and vibration sources
The test module types 0-1-4 are representative of all module types
014 CLIC modules
G. Riddone, CTC meeting, 20.10.2009
25
Type 0
Type 1
Type 4
A. Samoshkin
Objectives of the test modules
G. Riddone, CTC meeting, 20.10.2009
26
Two-beam acceleration in a realistic environment Cost- and performance optimized structures and their integration in CLIC
modules. Accelerating structure (ACS) alignment on girder using probe beam Wakefield monitor (WFM) performance in low and high power conditions
(and after a breakdown) Investigation of the breakdown effect on the beam
Alignment and stabilization systems in a dynamic accelerator environment RF network phase stability especially independent alignment of linacs Vacuum system performance especially dynamics with rf Cooling system especially dynamics due to beam loss and power flow
changes
Integration of all different sub-systems: , i.e. to simultaneously satisfy requirements of highest possible gradient, power handling, tight mechanical tolerances and heavy HOM damping
Validation of assembly, transport, activation, maintenance etc.
G. Riddone, CTC meeting, 20.10.2009
27
Choke mode flange
AS (CLIC-G)
PETS (mini tank)
Compact couplerwith internal splitter
ON/OFF unit
130 MW
Coupler with internal splitter
“Hammer” 3 dB splitter
3 dB splitter
RF load ~ 65 MW (tbc)
RF diagnostic
PETS (mini tank)
AS AS AS
DB Quad
CLIC module type 0
From CLIC module to CLEX module
PETS PETS
G. Riddone, CTC meeting, 20.10.2009
28
AS (CLIC-G)
Compact couplerwith internal splitter
Coupler with internal splitter
“Hammer” 3 dB splitter
3 dB splitter
RF load
RF diagnostic
PETS (mini tank)
AS AS AS
DB Quad
Existing 1-m PETS with recirculation
CLEX module type 0
From CLIC module to CLEX module
CLEX modules
G. Riddone, CTC meeting, 20.10.2009
14 accelerating structures5 PETS
29
750
mm
Phase 3: Modules 0 and 4Phase 4: Module 1 - 4.1: double length PETS- 4.2: two CLIC PETS replacing 1
double length PETS
FINAL C
ONFIGURATIO
N
Accuracy of 5 um is an issue: few WFM in a single structure
CLEX modules - configurations
G. Riddone, CTC meeting, 20.10.2009
30
No modifications on the test module type 0 HWNo RecirculationCurrent increase from 12 A to 19.2 APulse length reduced from 240 ns to 140 ns
No modifications on the test module type 0 HWAddition of a module type 1Increase of current from 19.2 A to 22 A
Phase 3, Conf. 3.1
Phase 3, Conf. 3.3
Phase 4, Conf. 4.1
Phase 4, Conf. 4.2
Nominal power and pulse length for 1 PETS and 2 ASRecirculation12 A and 240 ns
Modification on the test module type 1 HW (2 CLIC PETS)Needed klystrons and PC
G. Riddone, CTC meeting, 20.10.2009
Preliminary
integration study
of CLEX MODULES
014
A. Solodko
T0
T4
T1
Beam
Double-length PETS
31
CONCLUSIONS
G. Riddone, CTC meeting, 20.10.2009
32
Baseline defined for CDR Two alternative configurations to be studied: monogorder
and additional 1-cm long magnet in front of each quad decision by end of October 2010
In parallel study of other alternatives (e.g. cam system) Design has to be frozen by 1Q 2010 – a lot of work and
limited resources: needed close collaboration with all technical experts ADDITIONAL MANPOWER NEEDED, proposal for a meeting next week with JPD and HS agreement is urgent
Test module project with two parallel lines: in the lab (from 2010) in CLEX (from 2011) [also part of EuCARD – WP9.2 (G.
Riddone /WP9.3 (A. Jeremie)) ADDITIONAL MANPOWER NEEDED, meeting next week
with JPD and HS